Shaft-coupling



(No Model.) 4 2 SheetsSheet 1.

P. SHAW.

SHAFT COUPLING. No. 441,445. Patented Nov. 25, 1890.

' (No Model.) 2 Sheets-Sheet 2.

I.- SHAW.

SHAFT COUPLING.

No. 441,445. Patented Nov. 25, 1890.

manna "12 mm! KTERS 00,. WHO. Wm, B. c.

: mvgon UNITED STATES I PATENT OFFICE.

FRANK SHAXV, OF SYRACUSE, NEW YORK.

SHAFT-COUPLING.

SPECIFICATION forming part of Letters Patent No. 441,445, dated November 25, 1890.

Application filed December 28, 1389. Serial No. 334,710. (No model.)

To aZZ whom it may concern:

Be it known that l, FRANK SHAW, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Shaft-Couplings, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to an improved shaftcoupling, and has for its object the production of a simple and effective device which is produced at a minimum cost of manufacture and enables the shaft to be coupled with great ease, effectiveness, and rigidity; and to this end my invention consists, essentially, in an outer shell having separable divisions or sections, and a jaw or jaws movable toward the shaft and provided with an inclined outer face, whereby the operation of the said sections or divisions causes the said jaw or jaws to hold the separate sections of the shaft. My invention also consists in a novel construction of inner sleeve having slots or cutouts in which the biting-jaws are readily inserted from the end of said sleeve, so as to bear upon both sections of the shaft in order to engage both and firmly couple them together.

The invention furthermore consists in the detail, construction, and arrangement of the parts, all as hereinafter more particularlydescribed, and pointed out in the claims.

In describing this invention reference is had to the accompanying drawings, forming a part of this specification, in which like letters indicate corresponding parts in all the views.

Figure 1 represents an elevation of my improved shaft-coupling, illustrated as operatively connecting the ends of two shafts of different diameters. Fig. 2 is a longitudinal vertical section taken on line a a, Fig. 1,with the biting-dogs partly in section. Fig. 3 is a transverse sectional view taken on line y y, Fig. 2. Fig. 4 is a like transverse sectional View taken on line 2 .e',Fig. 2. Fig. 5 is an isometric perspective of the detached inner sleeve and dogs of my shaft-coupling. Fig. 6 is a like sectional view to Fig. 2, illustrating a modified form of inner sleeve and bitingdogs, and Fig. 7 is an end view of the device as illustrated in Fig. 6.

The outer shell A of my. improved shaftcoupling is composed of the separable sections B and 0, having their adjacent extremities b and c interlapping one with the other and provided with male and female threads, I I

whereby the said divisions may be moved toward or away from each other.

D represents the inner sleeve, preferably formed with conically-shaped extremities d 6?, against which bear the like comically-shaped surfaces b and 0', provided on the interior of the out-er extremities of the respective sections B and O of the outer shell A. This sleeve D is provided with one or more biting dogs E, having their outer faces e inclined substantially the same as the outer periphery of the inner sleeve D, and constructed of greater depth than that of the sleeve D, in order that their inner face 6, which is preferably provided with one or more cutting-edges 6 may project beyond the inner periphery D of the inner sleeve D. As preferably constructed, these jaws E are mounted in slots cl of the sleeve D, and in order to produ'ce the best effects I prefer to extend the inner end d of the slots beyond the center of the sleeve D and extend the opposite end of said slots to the outside face of said sleeve. construction of parts the biting-dog E, which preferably extends the entire length of the slot d, may be inserted from the end of the sleeve after the same has been placed within the outer shell A and before the said inner sleeve has been tightly contacted by the separate sections of the shell A. This is a feature of great advantage, since the outer and inner sleeve of the coupling may be loosely assembled in operative position upon the ends of the shafts to be secured, and then the dogs may be forced into position from the ends of the inner sleeve, whereupon thesections B and O of the outside shell are approximated together, and the said dogs, of slightly-greater depth than the inner shell,

are 'forced to engage the separate shafts with their inner biting-edges 6 As seen in the drawings, the divisions B and O of the outer shell are provided with engaging-points a,with which suitable wrenches (not illustrated) are engaged, thus forcing the jaws E inward with great power and causing their sharp edges e to out into the shaft and absolutely prevent their turning in With this the coupling. Indeed, experience has demonstrated that the grip of the jaws E is so powerful that a shaft will become twisted before turning in my coupling.

The positive operation of my coupling is further effected by extending the slots (1' in the sleeve D beyond the center thereof, and although, as in the drawings, when one shaft is of greater diameter than the other but half of these jaws bear upon both shafts, yet when, as is usually the case, both shafts are of equal diameter each key or dog E bears upon both of said shafts. As illustrated and as preferably constructed, these j awsE are six in numher, three being arranged at either end of the sleeve D and being preferably equidistant apart, in order that the hold upon the shaft may be very powerful and the strain equally distributed. Vhen, as illustrated, the shafts are of different diameter, the inner end of the dogs engaging the shaft of smaller diameter is provided with a recess or cut-out E, formed of suitable size to enable said end to grasp the shaft of larger diameter.

At Figs. 6 and 7 I have illustrated a form of my shaft-couplingin which the inner sleeve is composed of two separate pieces D and D having a space between them, with which a pair of keys or biting-dogs E are registered.

This is a very desirable form of coupling, but

j owing to the inner sleeve being composed of the separable divisions it requires greater time and care in operatively mounting said device.

In this form I have illustrated the dogs E as provided at their respective.- ends with recesses c", in order to enable them to operativelycouple together shafts of different thickness 0; two shafts of one diameter or two of another diam cteror of a slightly'larger diameter; but it is obvious that instead of forming the said jaws with separate recesses the desired adjustment of the coupling may be effected by using different jaws E.

I also produce a very desirable form of shafteoupling, in which the inner sleeve D is dispensed with, by using dogs E of considerable depth with a slight space between their adjacent edges, so as to allow said dogs to be forced inward when the sections B and C of the outer shell are approximated.

My improved shaft-coupling is very simple in construction and effective in operation, thus producing at a minimum cost of expense a shaft-coupling which will operatively secure together separate shafts without any liability of slipping. It will be understood, however, that considerable change may be made in the relative construction and arrangement of the parts of myinvention without departing from the spirit thereof; hence I do not limit myself to its precise form and construction.

Having thus fully described my invention, what Iclaim as new, and desire to secure by Letters Patent, is

tions, an inner sleeve provided with slots at the opposite extremities thereof, and biting dogs of greater depth than said sleeve rectilinearly movable in said slots at the extremities thereof, substantially as and for the purpose specified.

3. The herein-described shaft-couplinghaving an outer shell composed of separable sections, an inner sleeve having a slot, and a biting-dog movable in said slot and having a portion of its outer face adapted to contact with said outer shell, said portion being disposed in a plane at an angle with the inner biting-face of said dog, substantially as and for the pupose described.

4. In a shaft-coupling, the combination of an outer shell composed of separable sections, an inner sleeve provided with slots at the opposite extremities thereof, a biting-dog of greater thickness than said sleeve and movable in the slot at one extremity thereof, and a second biting-dog of greater thickness than the former biting-clog and movable in the slot at the opposite extremity of said sleeve, substantially as and for the purpose set forth.

- 5. In a shaft-coupling, the combination of an outside shell composed of sections movable toward and away from each other, inclined inner peripheral faces provided on the respective sections, an inner sleeve, and biting-jaws having inclined outer faces for engaging the inclined inner peripheral surfaces of the sections of the outer shell, substantially as and for the purpose described.

6. In a shaft-coupling, the combination of an outer shell composed of sections movable toward and away from each other, inclined inner peripheral surfaces provided upon said separate sections, an inner sleeve having slots or cut-outs extending on either side of the center thereof, and biting-dogs mounted in said slots and extending on the opposite sides of the center of said sleeve, said dogs being of greater depth than that of the said sleeve, substantially as set forth.

In testimony whereof I have hereunto signed my name, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 19th day of December, 1889.

FRANK SHrUV.

\Vitnesses:

CLARK II. NORTON, M. BAXTER.

ICC 

